org.apache.openjpa.slice.jdbc
Class DistributedSQLStoreQuery.ParallelExecutor

java.lang.Object
  org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor
      org.apache.openjpa.jdbc.kernel.SQLStoreQuery.SQLExecutor
          org.apache.openjpa.slice.jdbc.DistributedSQLStoreQuery.ParallelExecutor

All Implemented Interfaces:

StoreQuery.Executor

Enclosing class:

DistributedSQLStoreQuery

public static class DistributedSQLStoreQuery.ParallelExecutor
extends SQLStoreQuery.SQLExecutor

Executes queries on multiple databases.

Author:

Pinaki Poddar

Constructor Summary

DistributedSQLStoreQuery.ParallelExecutor(DistributedSQLStoreQuery dsq, ClassMetaData meta, boolean p)

Method Summary

void	addExecutor(StoreQuery.Executor ex)
(package private) boolean	containsReplicated(QueryContext query) Scans metadata to find out if a replicated class is the candidate.
Number	executeDelete(StoreQuery q, Object[] params) Deleted the objects that result from the execution of the query, retuning the number of objects that were deleted.
ResultObjectProvider	executeQuery(StoreQuery q, Object[] params, StoreQuery.Range range) Each child query must be executed with slice context and not the given query context.
Number	executeUpdate(StoreQuery q, Object[] params) Updates the objects that result from the execution of the query, retuning the number of objects that were updated.
(package private) List<SliceStoreManager>	findTargets()

Methods inherited from class org.apache.openjpa.jdbc.kernel.SQLStoreQuery.SQLExecutor

executeQuery, executeUpdate, getDataStoreActions, getOperation, isPacking, prepareCall, prepareCall, prepareStatement, prepareStatement, toParameterArray

Methods inherited from class org.apache.openjpa.kernel.AbstractStoreQuery.AbstractExecutor

getAccessPathMetaDatas, getAlias, getAscending, getOrderedParameterTypes, getOrderingValue, getParameterTypes, getProjectionAliases, getProjectionTypes, getQueryExpressions, getRange, getResultClass, getResultShape, getUpdates, hasGrouping, isAggregate, isDistinct, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DistributedSQLStoreQuery.ParallelExecutor

public DistributedSQLStoreQuery.ParallelExecutor(DistributedSQLStoreQuery dsq,
                                                 ClassMetaData meta,
                                                 boolean p)

Method Detail

addExecutor

public void addExecutor(StoreQuery.Executor ex)

executeQuery

public ResultObjectProvider executeQuery(StoreQuery q,
                                         Object[] params,
                                         StoreQuery.Range range)

Each child query must be executed with slice context and not the given query context.

Specified by:

executeQuery in interface StoreQuery.Executor

Overrides:

executeQuery in class SQLStoreQuery.SQLExecutor

See Also:

StoreQuery.Executor.isPacking(org.apache.openjpa.kernel.StoreQuery)

containsReplicated

boolean containsReplicated(QueryContext query)

Scans metadata to find out if a replicated class is the candidate.

executeDelete

public Number executeDelete(StoreQuery q,
                            Object[] params)

Description copied from interface: StoreQuery.Executor

Deleted the objects that result from the execution of the query, retuning the number of objects that were deleted.

Specified by:

executeDelete in interface StoreQuery.Executor

Overrides:

executeDelete in class AbstractStoreQuery.AbstractExecutor

executeUpdate

public Number executeUpdate(StoreQuery q,
                            Object[] params)

Description copied from interface: StoreQuery.Executor

Updates the objects that result from the execution of the query, retuning the number of objects that were updated.

Specified by:

executeUpdate in interface StoreQuery.Executor

Overrides:

executeUpdate in class SQLStoreQuery.SQLExecutor

findTargets

List<SliceStoreManager> findTargets()